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-rw-r--r--youtube_dl/extractor/youtube.py4
1 files changed, 3 insertions, 1 deletions
diff --git a/youtube_dl/extractor/youtube.py b/youtube_dl/extractor/youtube.py
index 1cd2d40f1..e573b021d 100644
--- a/youtube_dl/extractor/youtube.py
+++ b/youtube_dl/extractor/youtube.py
@@ -778,7 +778,9 @@ class YoutubeIE(YoutubeBaseInfoExtractor):
self.to_screen(u'%s: Encrypted signatures detected.' % video_id)
video_info['url_encoded_fmt_stream_map'] = [args['url_encoded_fmt_stream_map']]
m_s = re.search(r'[&,]s=', args.get('adaptive_fmts', u''))
- if m_s is not None and 'adaptive_fmts' in args:
+ if 'url_encoded_fmt_stream_map' not in video_info or not video_info['url_encoded_fmt_stream_map']:
+ video_info['url_encoded_fmt_stream_map'] = ['']
+ if m_s is not None:
video_info['url_encoded_fmt_stream_map'][0] += ','+args['adaptive_fmts']
elif 'adaptive_fmts' in video_info:
video_info['url_encoded_fmt_stream_map'][0] += ','+video_info['adaptive_fmts'][0]